Stop-motion



S. H. GOLDSTEIN.'

STOP MOTION.

` APPLICATION FILED AUG.I5, 1921. 1,394,546. Patented 0013. 25, 19x21. I .1. 6 .5G I 6 A 6 .5L-L l .5o

mllullllllllllll Iy Zw@ Hfw@ www UNITED STATES earner ottica.

SAMUEL H. GOLDSTEIN, OF PHILADELPHIA, IPENSYLVANIA.

Specification of Letters Patent.

STOP-MOTION.

Patented Oct. 25, 1921.

Application led August 15, 1921. Serial No. 492,384.

To allee/0111, t may concer/'1%.'

Be it known that l, SAMUEL H. GoLDs'rErN, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented the Stop-Motion, ot' which the following is a -spec-ilication.

One'object of this invention is to provide a relatively simple, inexpensive vand cornpact device which shallvbe controlled by a threadand which shall be automatically actua-ted upon breakage or slacking of said thread to stop the machine to'which the latter is normally delivered.

i 'I further desire to provide a stop motion which shall be certain and sensitive in its action, not likely to get out of order, which may be easily reset after operating and which shall exert a minimum stress upon the thread by which'it is controlled. j These objects and other advantageous ends I' -attain as'hereinafter set forth, reference being had to the accompanying drawings, in which, l

Figures 1 and 2 are respectively side and 'end elevations Oia stop-motion constructed infaccordancewith my invention; and

` `Figs. 3 and 4 are elevations of the stop motion shown in Figs. land 2 with the cover voff-'the casing removed showing the parts in their set and in their released positions respectively.

` InY the above drawings, lprepresents a rod or bar forming a part of or connected to a lbobbin stand or some relatively fixed part of a knitting machine, and 2 isa relatively movable part of thesarneinachine such as the rotary gear ring lor other rotary element having a 'series ofholes ofv which one is indicated at 3. 1 l 1 *In accordance with my invention I inount on the barorrod 1 "a casing 4 held to it in the4 present instanceby a pair of integral collars15, each of whichA is equipped with "a setv screwV 6 Vfor holding said casing immovably in'place. The-A lcasing is provided with afcover plate 7 held in place by a screw S and fin thisplate as well as in the opposite orv rear` side of the casing 4' are journaled t-wofrelatively small alined spindles 9 and 9?,"ea'ch o -which within the casing has' an arinlOr extending atright. angles and having its extremityv 1-1 extended l.parallel with its! body portion 9. Outside of the -casing each I of these spindles has'fxed to it an arm or j thread-controlled iinger 12 having a thread-engaging loop 13 designed to coperate with a fixed yarninger 1'4- and having mounted on it an adjustable weight 15 tending to swing it from the position shown in ull lines in Fig.` 1 to that Shown in dotted mes.

Under conditions of operation the yarn or thread extends in the lines m-na Figs. 1 and 2, between the loops of the fingers 12 and 14 and holds the linger 12 in the position shown in Fig. 1 in full lines, Vwith the spindles 9 and 9a and the arms 10 and 11 in the positions shown in Fig. 3. Inside the casing I mount a trigger lever 16 pivoted at 17 to a suitable supporting block 1721 and having an arm at right angles to its body extended adjacent the projecting offset arms 11 of the spindles 9 and 9a. Adjacent the junction ot this angular arm with the bodyl of-said lever I form a hook 18 designed to coperate with a pin 19 preferably of angular vSection projecting laterally from one end of an arm 2O which is pivoted to the lower part of the casing 21.

A suitable spring 22 acts on the trigger lever 16 adjacent its pivot 17 so as to tend to retain it in engagement with the pin or projection 19 of said arm 20, and the latter adjacent its pivot 21 is formed with a longitudinally extending slot 23 in which is slidable a pin or projectionl 24 extending laterally trom one arm oi a manually controlled setting lever 25 pivoted 'within the casing on a screw 26 and extending outsideof the samel through a slot 27 in one end thereof. The'arm of this lever, which projects outside of thecasing is adapted tobe moved by an operator and has connected to it a bolt 28 suitably guided in the casing andk capable of being projected outsideof the same so as to enteroneoil the openings 3 in the relatively movable structur'e 2. A spring 29 acts on the lever 25 in such manneras Vto at all ltimes tend to move it into such a position'as to project this bolt. l Y

TJnder conditions oi use the' threads azare run through suitable guides' 30'and between the fixed and movable lingers 12 and 14 so that the spindles 9 and `9n are held in such positions that their arms 11 within the casing do not press against the trigger lever 16. If now the projecting end 'of the llever V25 be moved upwardly from Vthe position shown in Fig. 4, toward that shown in Fig. 3, its pin 24 will slide in the slot 23 and somove the V arm 20 as vto cause its pin to engage the hooked end 18 of the lever 16 vio and ultimately enter said hook thereof, which thereafter' holds the parts in their set positionsjwith the bolt 28 held clear of the rotary element 2. The Vmachine to which the device is attached may now be put in operation.

Y Under these conditions the trigger lever` will remain set until one of the threads ma2 breaks or becomes slack, whereupon the corresponding thread-controlled vlinger 12 is released and under the action of its weight l5 moves with its spindle 9 or 9n into the position indicated in dotted lines in Fig. 1. As a consequence of this movement, the projecting arm 11 of the spindle presses against the upwardly projecting arm of the trigger through the lever and pin 24E. This release of said lever 25 causes downward move- Y ment and a consequent projection of the bolt 28 so that it enters the rotary element 3 and by stopping its movement relatively to the casing 4 and fixed member 1, sets in operation suitable stopping mechanism suchas a belt shifter or braking mechanism. The machine .is thereupon almost instantly stopped so that there is no Vdamage to the goods operated on, as otherwise occurs by reason of the continued operation or drifting of the f machine. After the broken thread has been tied or a new thread has been placedbetween the lingers 12 and 13, or when slack has been taken up, the lever 25 may be again moved'to the position shown in Fig. 3, thus releasing the bolt 28 from the lrotary member 2 and permittingfthemachine to again be put in operation.

,It is to be particularly noted that not onlyl isiny device exceedingly simple and substantial in construction but its nature Vis such that it constitutes a complete,rportable and easily applied thread controlled apparatus applicable to knitting machines of standard construction, without requiring material change. Moreover; as-above indicated, it is characterized by its rapid, sensitive and cer- Y ya projection voni-said setting lever; aspring operativeon'the lever and tending to project the bolt; a hook coperative withy the arm for holding it with the setting lever and l2. The combination in a stop motion of a l supporting structure; a relatively fixed thread finger thereon; a relatively movable thread finger` coperative with said first linger and having an operating arm; a weight on said second `linger tending to swino' it away from said first finger; a slidable tbolt carried by the supporting'structure; a spring actuated. lever tending to project said bolt; ,n and means including a pivotally mounted member movableby the operating arm of the second thread finger to releasably retain the spring actuated lever and the bolt in a set position. n

3. The combination in a stop motion of'a casing; a spindle j ournaled in a Wall thereof and lhaving an arm inside of said casing; a thread finger connected' to the spindle outside of the casing and including twoV arms at an angle to each other; a weight on one oi the armsof said thread ngertending to move itV from a position in'which it is normally held by a thread; a spring-actuated bolt; and mechanism in the casing normally holding the bolt in a set position and releasable by a movement of the spindle arm resulting Vfrom swinging of the thread finger under the action of its weight.

4. The'combination in a stop. motion of a casing;a weighted thread finger` having a n setting lever extending into ,the casing and having a pin operative inan elongated slot of said arm; avbolt connected'tosa'id'latter lever and slidably guided in an opening of the casing; withra spring acting on the setting lever and tending te move, it into `a position to project said'bolt. .i A j 5. The combination of a relatively flat casing; `a slidable bolt projectable therefrom; a spring-actuated` setting leverY connected to said Vbolt and havinga projecting pin; an arm having'a projection and formed with a slot for the receptionv of-the pin of the setting lever; a second lever inthe casing having a hook for engagement with the projection of said arm;ytwos`pindles respectively.V

having arms' in the casing positioned to actuate Said'hook lever; With'weighted thread lingers respectively connected to said spindles and fixed lingers mounted to coperatejwth lingers from movement.

sAMUEL eoLDsrE-IN. 

